Harrow.



B. SERLAGHIUS.

' HARROW. APPLIOA TION FILED AUG. 10, 19,12. RENEWED OUT. 8, 1913.

13384 494, Patented Jan. 13, 1914.

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BIRGER SERLACHIUS, 0F JACOIBSTAD, FINLAND. v

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Application filed August 10, 1912, Serial No. 714,406. Renewed October9, 1918.

To all whom it may concern Be it known that I, BIRGER SERLACHIUS, asubjectof the Emperor of Russia, and resident at J acobstad, Finland,have invent ed certain new and useful Improvements in Harrows, of whichthe following is a specification. J

The object of the present invention is to provide in a harrow structurea frame of especial design having shafts adjustably mounted thereon, theshafts carrying soil engaging blades. The shafts are arranged preferably3 in number and are positioned one behind the other. Means is providedfor holding the terminal shafts of the series in parallel relation toeach other when. the said shafts are adjusted at an angle to the line ofdraft to the harrow and means is provided for moving the intermediateshaft to an angle with relation to the line of draft and at the sametime that the terminal shafts are shifted. The angle inclination of theintermediate shaft is equal to the angle of inclination of the terminalshafts, but the connection between the shafts is such that when the endsof the terminal at one side of the harrow frame are moved in onedirection the end of the intermediate shaft is moved a correspondingdistance in the opposite direction.

In the accompanying drawing: Figure l is a top plan view of the harrow.Fig. 2 is a side elevation of the same.

As illustrated in the accompanying drawing the harrow includes a frame,the side bars of which are made up of a succession of arcuate portions,or sections 0, these arcuate sections constitute guides for bearings b.Collars e are carried by the bearings Z) and shafts a are journaled attheir ends in the collars e. Harrow blades (2 are carried by the shaftsa.

'A shaft f is journaled at the rear portion of the frame of the harrowand a lever g is fixed to one end of the said shaft f. An arm 70 isfixed to the other end of the shaft f. Links n, of equal length arelocated at the opposite sides of the frame of the harrow and the forwardends of the said links are pivotally connected with the forward bearingsb and the rear ends of the said links are pivotally connected with therearmost bearings b. Thus the terminal shafts and the series of shaftsare connected together and are constrained to move in unison along theframe.

A link m is pivotally connected at its for- Serial No. 794,324.

Ward end with an intermediate bearing 71 and at its rear end ispivotally connected to the lower end of the arm is. A similar link m ispivotally connected at its forward end with the other intermediatebearing b and at its rear end is pivotally connected with the lever g ata point above the shaft 70. A link Z: is pivotally connected at itsforward end with one of the rearmost bearings b and at its rear end ispivotally connected with the upper end of the arm 70. A similar link Zis pivotally connected at its forward end with the other rearmostbearing 2) and is pivotally connected at its rear end with the lever gat a point below the shaft f. By this arrangement it will be seen thatwhen the lever g is swung the links m will move the intermediatebearings I) along the intermediate arcuate sections 0 of the sides ofthe frame of the harrow. But, inasmuch as one of the links m isconnected with the lower end of the arm 70 at a point below the shaft fand the other link m is connected at its rear end with the lever g at apoint above the shaft f, the bearings I) located at the ends of theintermediate shaft a move in opposite directions. At the same time thatthe lever g is swungthe links Z move the bearings b at the opposite endsof the rearmost shaft a in opposite directions, and through theconnecting links n the bearings b at the opposite ends of the foremostshaft a are moved correspondingly. By reason of the fact that the link Zat one side of the frame of the harrow is connected at its rear end withthe upper end of the arm 7,: and the link Z at the opposite side isconnected at its rear end with the lower end of the lever 9, these linksmove in opposite directions as the lever g is swung and the links'Z andm at the same side of the frame of the harrow move in directionsopposite to each other. Therefore whenthe ends of the terminal shafts atone side of the frame of the burrow move in a forward direction the endof the intermediate shaft a at the same side moves in a rear directionand vice-versa. The extent of movement of all of the shafts ispractically the same and the shafts approximately are disposed at equalangles to the median longitudinal dimension of the frame of the harrow.By such an arrangement it will be seen that a simple and an effectivemeans is'providcd for which the disposition of the blades (Z withrelation to the line of draft of the barrow and that they gether, meansmay be adjusted While the harrow is in operation also the blades carriedby the terminal shafts being disposed opposite to the blades carried bythe intermediate shaft. The action of the blades in the soilapproximately counteracts each other and thus the tendency to side draftis eliminated.

Having described the invention What is claimed, is:

1. A harrow provided at its opposite sides With arcuate sections,bearings arranged to move along the sections, shafts journaled in thebearings, links connecting the terminal bearings at the same side of theframe tofor moving the terminal bearmgs along the sections on one sidein one direction andineafis'for simultaneously movingthe intermediatebearings on that side along its section in an opposite direction.

2. A harrow comprising a frame having at its opposite sides arcuatesections, bearings mounted for movement along the arcuate sections,shafts mounted in the bearings, soil engaging members carried by theshafts, an operating shaft, links connecting the bearings at theopposite ends of the shafts with the operating shaft to simultaneouslymore the ends of tWo soil member shafts on one side in one direction andthe opposite ends of said two soil member shafts on the other side inthe opposite direction, and means for operating the shaft.

3. A harrow comprising a frame having at its opposite sides threearcuate sections, bearings mounted for movement along the armatesections, three shafts mounted in the bearings, soil members mounted onthe shafts, means for simultaneously moving the ends of the end shaftson one side in one direction and the opposite ends of said end shafts inthe opposite direction, and moving the opposite ends of the intermediateshaft in directions opposite to the movement of the respective ends ofthe end shafts.

In testimony whereof I have hereunto set my hand in presence of twoWitnesses.

BIRGER SERLACHIUS.

Witnesses:

EMIL SANDSTROM, SIG-RID SANDSTROIVL.

